The purpose of this study was to describe the perceived burden of the stroke patient's caregiver and related factors to analyze relationships between perceived burden and social supports. A convenient sample of 225 caregivers who take care for a stroke patient at home participated in this study. Caregiver's perceived burden was measured by the objective and subjective burden scale developed by Montgomery (1985). Related factors of burden were studied in terms of the patient's instrumental activties of daily living, cognitive function, caregiver's demographic variables and caregiver's illness intrusiveness. The results were as follows: (1) The mean of objective burden score was 4.5, and subjective burden score was 3.1. These scores show that caregivers perceive moderate level of burden. (2) Caregivers' objective burden was significantly related to caregivers's illness intrusiveness (r=.62), patient's IADL (r=-.33), and patient's cognitive function (r=-.15). The subjective burden was related to the caregiver's illness intrusiveness (r=.29), the patient's IADL (r=.24), and the caregiver's age(r=.23). (3) The percentage of stroke caregivers who perceived physical support was 49.1%. The percentage of those who perceived emotional support was 61.0%, and those who perceived financial support totaled 37.6%. (4) Caregivers who received any type of social supports perceived lower subjective burden, and caregivers who received physical or psychological support perceived lower objective burden. These results emphasized the necessity of a rehabilitation programs for stroke patients and support program for family caregivers.